[ntp:questions] Compensating for asymmetric delay on a per-peer/server basis?
tik-tok at bodosom.net
Sat Sep 13 13:27:31 UTC 2014
On Sat, Sep 13, 2014 at 1:46 AM, Rich Wales <richw at richw.org> wrote:
> Any thoughts?
Something is wrong with your home machine but there's nothing you can
do with stock NTP to fix your offset.
As posted earlier I see exactly the same ~2ms offset. However as
noted -- given that you're on the same network -- these two lines are
-184.108.40.206 .PPS. 1 u 13 16 372 8.168 -2.126 4.585
-220.127.116.11 18.104.22.168 2 u 2 16 333 9.689 2.146 3.930
and these two are pretty bad (and given the same polling interval
might also be junk)
+22.214.171.124 .GPS. 1 u 45 64 377 35.222 6.542 2.864
+126.96.36.199 .PPS. 1 u 18 64 377 191.192 4.890 8.968
My original question remains. Do you have a production need to remove
the offset or is it for aesthetic reasons?
Regarding shaping. An extremely cursory look suggests you can use a
Linux qdisc to insert a delay (shape to effective speed) in NTP
traffic so if you have an appropriate box to place between you modem
and your home network you could try that -- after you resolve your
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